This strikes me more as a matter of taste, i.e. more art than something which can be provably wrong, or correct for that matter. The concerns you outlined might be concerns the author doesn't have to worry about for whatever reason -- if this fits neatly and seamlessly into their existing workflows then that's great, and I for one appreciate learning about other peoples' approaches like this even if they don't immediately work for me

IMV it's a clever trick, and like you my instinct is that if I attempted to integrate this into my own workflows, I would endure some sort of hardship down the line but it's not immediately obvious when or how. Or maybe for certain things it would be fine and less painful than other options, like other similarly clever tricks I felt uneasy about at first